App Development

I'm looking for a freelancer to develop an app for both iOS and Android platforms with a specific design I already have in mind. The main focus of the app is social networking. I want someone who is well-versed in app development to build an app that meets my specifications and can be used by a large audience. The finished product should be stable and have a good user interface and experience. I expect the freelancer to take charge of the back-end development as well, ensuring the app is well optimized and functions without any glitches. I'm also willing to have open and clear communication throughout the development process so the project is done right.